CVE-2026-47276

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (33rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
6.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in properties_parse() allows an authenticated attacker to crash the NanoMQ broker by sending a POST request to /api/v4/mqtt/publish with user_properties as a JSON array instead of a JSON object. The crash occurs because strlen() is called on a NULL item->string pointer when iterating over array elements. An authenticated attacker can exploit this to crash the NanoMQ broker process. This is patched in version 0.24.14.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 20, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 20, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

NULL Pointer Dereference in REST API properties_parse via Malformed user_properties · Advisory · nanomq/nanomq · GitHub

https://github.com/nanomq/nanomq/security/advisories/GHSA-qq2v-xvxg-3hvf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 124 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 24 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-12 16:02 UTCEG score recompute
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  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
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  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-04 14:56 UTCEG score recompute
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
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  18. 2026-10-01 07:42 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
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  25. 2026-09-24 03:28 UTCEG score recompute
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  1. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-09-23 01:40 UTCEG score recompute
  3. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-18 03:56 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  8. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  10. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  12. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-09-12 09:59 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  19. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-09-07 22:53 UTCEG score recompute
  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  23. 2026-09-06 11:44 UTCEG score recompute
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  25. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  26. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  27. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  28. 2026-08-31 02:23 UTCEG score recompute
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  30. 2026-08-30 02:35 UTCEG score recompute
  31. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  32. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  33. 2026-08-27 22:13 UTCEG score recompute
  34. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
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  38. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
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  41. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  42. 2026-08-22 22:16 UTCEG score recompute
  43. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  70. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  75. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile

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Frequently asked(5)

What is CVE-2026-47276?
CVE-2026-47276 is a medium-severity vulnerability; its CVE record was published on July 20, 2026. In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in propertiesparse() allows an authenticated attacker to crash the NanoMQ broker by sending a POST request to /api/v4/mqtt/publish with userproperties as a JSON array instead of a JSON object. The crash occurs because strlen() is…
When was the CVE record for CVE-2026-47276 published?
The CVE record for CVE-2026-47276 was published on July 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-47276 actively exploited?
CVE-2026-47276 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-47276?
CVE-2026-47276 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-47276?
The CVE record for CVE-2026-47276 names the fix: "This is patched in version 0.24.14."

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